Waterproofing is the only part of a bathroom that has to work perfectly and is impossible to inspect once the tile is on. It is also the layer most often reduced to a coat of paint on a board that was never rated for water.
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Six boxes, about thirty seconds. You pick when to be called back, and that is when the phone rings.
Or call (402) 698-8275The distinction the code draws is worth stating exactly. IRC R702.3.7.1 says water-resistant gypsum backing board "shall not be used where there will be direct exposure to water, or in areas subject to continuous high humidity," and R702.3.7 adds that water-resistant gypsum board shall not be installed over a Class I or II vapor retarder in a shower or tub compartment, with cut and exposed edges — including those at wall intersections — sealed as the manufacturer recommends, per the IRC wall covering chapter. Water resistant means it tolerates humidity. Waterproof means liquid water cannot pass. A shower needs the second thing, and green board is the first thing. Bellevue enforces the 2021 IRC, Chapters 2 through 24 plus Chapter 44, per § 8-17 of the city code.
IRC Table R702.4.2 names what may back wall tile in tub and shower areas: glass mat gypsum backing panel to ASTM C1178, fiber-reinforced gypsum panels to ASTM C1278, nonasbestos fiber-cement backer board to ASTM C1288 or ISO 8336 Category C, and nonasbestos fiber mat-reinforced cementitious backer units to ASTM C1325, per the IRC wall covering chapter. Those are substrates, not membranes. A cement board wall without a membrane or a surface-applied waterproofing layer still passes water into the cavity; cement board simply does not degrade when it happens. The assembly that performs pairs a listed backer with either a sheet membrane, a bonded liquid membrane applied to the manufacturer's wet-film thickness, or a foam board system with sealed seams.
IRC R307.2 requires a nonabsorbent finish on shower walls, and on bathtub walls where a showerhead is installed, to a height of 72 inches above the floor, and in a shower with no curb that 72 inches is measured from the drain inlet rather than the floor, per this reading of R307.2. That second clause is the one people miss on a curbless build, where the floor plane slopes away and the reference point moves. Seventy-two inches is a minimum. In a room with an eight-foot ceiling and a rain head mounted overhead, carrying the membrane and the tile to the ceiling removes the horizontal termination joint that would otherwise sit right where the wettest air collects.
Flat field area almost never fails. Failures happen at inside corners, at the wall-to-pan transition, at the curb, at the drain flange, at valve and showerhead penetrations, at niche openings and at fastener heads. Every one of those gets treated as a detail rather than as part of the field: preformed corners or reinforcing band bedded in the membrane, a bonding flange drain integrated with the sheet or liquid system, sealant compatible with the membrane at pipe penetrations, and a niche waterproofed as its own small room with a sloped sill. Mixing manufacturers across a single assembly is where warranties and performance both end.
A flood test is the only real verification available. Plug the drain, fill the pan to just below the top of the curb or the perimeter, mark the water level, and leave it for 24 hours with a look at the ceiling or the joist bay below. Do that before the tile is set, because after the tile is set the test tells you a leak exists without telling you where. Bellevue's permit division states that when a trap, drainpipe, soil, waste or vent pipe is removed and replaced with new material the job is new work for which "a permit shall be procured and inspections made as provided," per the City's permit FAQ. The City's Permits and Inspection Division runs six inspectors and two administrative personnel and in 2009 received a second number one rating from the Insurance Services Office in the Building Code Effectiveness Grading Classifications, a rating awarded to only five jurisdictions in the country, per the City's permits and inspections page. Concealed work is worth showing before it is concealed.
On an exterior wall the waterproofing decision interacts with the vapor decision, which is why R702.3.7 bars water-resistant gypsum over a Class I or II vapor retarder inside a shower compartment. Nebraska is Climate Zone 5, where the 2018 energy code prescribes R-20 or R-13 plus R-5 continuous for a wood frame wall and 3 air changes per hour at 50 pascals, per the state energy code summary, and Sarpy County's 99 percent heating design temperature is 2 degrees Fahrenheit, per the county design temperature guide. A shower wall on the outside of the building needs one continuous water control layer on the room side and enough insulation that the cavity does not sit at dew point. Two membranes with a cold cavity between them is how a wall stays wet. For the tile that goes over all of this, see bathroom tile installation.
Bathroom Waterproofing in Bellevue. Call (402) 698-8275 and a technician is dispatched with the parts on the truck. You get the price before the work starts.
Call (402) 698-8275Bellevue’s Permits and Inspection Division says regulated construction, alteration, repair, improvement, or conversion requires a permit unless exempted, and separate plumbing, mechanical, and electrical permits are required unless exempt. It also says replacement plumbing material or rearrangement of pipes or fixtures is new work for which permits and inspections are required.
Why it matters: A bathroom project that changes drains, supply lines, fixtures, ventilation, walls, or electrical work needs its permit-sensitive scope identified before demolition. Those review and inspection points belong in the construction sequence before new walls, tile, or flooring conceal the work.
Source: bellevue.net
Bellevue Public Schools records that on May 20, 1959, it and the Secretary of the Air Force entered a lease for a school within the Offutt Family Housing Annex known as Capehart Housing; the first of three elementary schools there was dedicated in 1961.
Why it matters: Base-adjacent Bellevue housing spans a long period, so a bathroom scope should be based on the room in front of the remodeler. Compact layouts, limited wall depth, layered finishes, tight access, and earlier updates need to be measured before fixtures and tile are selected.
Source: ne50000580.schoolwires.net
During the March 2019 Missouri River flood, water began reaching Offutt Air Force Base on March 15; two days later the Air Force reported water affecting roughly 30 base buildings and stated that personnel were battling historic flood conditions.
Why it matters: For basement bathrooms and lower-level finish work, the 2019 event makes it sensible to inspect for moisture evidence, prior repairs, and suitable substrate before new flooring, wall finishes, or a shower assembly conceal the space. It does not mean assuming every lower level has damage.
Sources: offutt.af.mil · bellevue.net
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